add untyped_call

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@6027 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/config/convex/convex.md b/gcc/config/convex/convex.md
index 37e2696..1cdb78a 100644 (file)
--- a/gcc/config/convex/convex.md
+++ b/gcc/config/convex/convex.md
@@ -1908,6 +1908,44 @@
   ""
   "* return output_call (insn, &operands[1]); ")
 
+;; Call subroutine returning any type.
+
+(define_expand "untyped_call"
+  [(parallel [(call (match_operand 0 "" "")
+                  (const_int 0))
+            (match_operand 1 "" "")
+            (match_operand 2 "" "")])]
+  ""
+  "
+{
+  int i;
+
+  emit_call_insn (gen_call_pop (operands[0], const0_rtx,
+                               const0_rtx, const0_rtx));
+
+  for (i = 0; i < XVECLEN (operands[2], 0); i++)
+    {
+      rtx set = XVECEXP (operands[2], 0, i);
+      emit_move_insn (SET_DEST (set), SET_SRC (set));
+    }
+
+  /* The optimizer does not know that the call sets the function value
+     registers we stored in the result block.  We avoid problems by
+     claiming that all hard registers are used and clobbered at this
+     point.  */
+  emit_insn (gen_blockage ());
+
+  DONE;
+}")
+
+;; UNSPEC_VOLATILE is considered to use and clobber all hard registers and
+;; all of memory.  This blocks insns from being moved across this point.
+
+(define_insn "blockage"
+  [(unspec_volatile [(const_int 0)] 0)]
+  ""
+  "")
+
 (define_expand "return"
   [(return)]
   ""